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Fencer Intel
medium 6.5

CVE-2020-26136 json

Authentication bypass in SilverStripe GraphQL

published 5y ago modified 4mo ago also BIT-silverstripe-2020-26136 , EUVD-2021-1357 , GHSA-mg2g-8pwj-r2j2

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

In SilverStripe through 4.6.0-rc1, GraphQL doesn't honour MFA (multi-factor authentication) when using basic authentication.

Patch / fix

  • packagist silverstripe/graphql 3.5.0, 4.0.0-alpha2
  • bitnami silverstripe 4.6.0
  • silverstripe silverstripe 4.6.0

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Exploit prediction

1.16% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • silverstripe.org https://www.silverstripe.org/download/security-releases/cve-2020-26136 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:P/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
packagist silverstripe/graphql
>=3.0.0, <3.5.0
>=4.0.0-alpha1, <4.0.0-alpha2
3.5.0
4.0.0-alpha2
bitnami silverstripe
<4.6.0
>=4.6.0-rc1, <=4.6.0-rc1
4.6.0

Classification

Weakness
  • CWE-287 Improper Authentication
  • CWE-288 Authentication Bypass Using an Alternate Path or Channel

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.